Standardize usage of virtual/override/final in chrome/

chrome/service/cloud_print/printer_job_queue_handler.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/service/cloud_print/printer_job_queue_handler.h"
 
 #include <math.h>
 
 #include <algorithm>
 
 #include "base/values.h"
 
 namespace cloud_print {
 
 class TimeProviderImpl : public PrinterJobQueueHandler::TimeProvider {
  public:
-    virtual base::Time GetNow() override;
+  base::Time GetNow() override;
 };
 
 base::Time TimeProviderImpl::GetNow() {
   return base::Time::Now();
 }
 
 JobDetails::JobDetails() {}
 
 JobDetails::~JobDetails() {}
 
@@ skipping 130 matching lines @@
 
     job_found.first->second.retries_ += 1;
     job_found.first->second.last_retry_ = time_provider_->GetNow();
   }
 
   return true;
 }
 
 }  // namespace cloud_print